package jun.carlauncher.utils;

/**
 * Created by NocodeLee on 2017/10/26.
 * Email：lirizhilirizhi@163.com
 */


import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;

/**
 * <pre>
 *     author: Blankj
 *     blog  : http://blankj.com
 *     time  : 2017/06/22
 *     desc  : 文件读写相关工具类
 * </pre>
 */
public final class FileIOUtils {

  private FileIOUtils() {
    throw new UnsupportedOperationException("u can't instantiate me...");
  }

  private static final String LINE_SEP = System.getProperty("line.separator");

  private static int sBufferSize = 8192;

  /**
   * 将输入流写入文件
   *
   * @param filePath 路径
   * @param is       输入流
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromIS(final String filePath, final InputStream is) {
    return writeFileFromIS(getFileByPath(filePath), is, false);
  }

  /**
   * 将输入流写入文件
   *
   * @param filePath 路径
   * @param is       输入流
   * @param append   是否追加在文件末
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromIS(final String filePath, final InputStream is, final boolean append) {
    return writeFileFromIS(getFileByPath(filePath), is, append);
  }

  /**
   * 将输入流写入文件
   *
   * @param file 文件
   * @param is   输入流
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromIS(final File file, final InputStream is) {
    return writeFileFromIS(file, is, false);
  }

  /**
   * 将输入流写入文件
   *
   * @param file   文件
   * @param is     输入流
   * @param append 是否追加在文件末
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromIS(final File file, final InputStream is, final boolean append) {
    if (!createOrExistsFile(file) || is == null) return false;
    OutputStream os = null;
    try {
      os = new BufferedOutputStream(new FileOutputStream(file, append));
      byte data[] = new byte[sBufferSize];
      int len;
      while ((len = is.read(data, 0, sBufferSize)) != -1) {
        os.write(data, 0, len);
      }
      return true;
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    } finally {
      CloseUtils.closeIO(is, os);
    }
  }

  /**
   * 将字节数组写入文件
   *
   * @param filePath 文件路径
   * @param bytes    字节数组
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByStream(final String filePath, final byte[] bytes) {
    return writeFileFromBytesByStream(getFileByPath(filePath), bytes, false);
  }

  /**
   * 将字节数组写入文件
   *
   * @param filePath 文件路径
   * @param bytes    字节数组
   * @param append   是否追加在文件末
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByStream(final String filePath, final byte[] bytes, final boolean append) {
    return writeFileFromBytesByStream(getFileByPath(filePath), bytes, append);
  }

  /**
   * 将字节数组写入文件
   *
   * @param file  文件
   * @param bytes 字节数组
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByStream(final File file, final byte[] bytes) {
    return writeFileFromBytesByStream(file, bytes, false);
  }

  /**
   * 将字节数组写入文件
   *
   * @param file   文件
   * @param bytes  字节数组
   * @param append 是否追加在文件末
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByStream(final File file, final byte[] bytes, final boolean append) {
    if (bytes == null || !createOrExistsFile(file)) return false;
    BufferedOutputStream bos = null;
    try {
      bos = new BufferedOutputStream(new FileOutputStream(file, append));
      bos.write(bytes);
      return true;
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    } finally {
      CloseUtils.closeIO(bos);
    }
  }

  /**
   * 将字节数组写入文件
   *
   * @param filePath 文件路径
   * @param bytes    字节数组
   * @param isForce  是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByChannel(final String filePath, final byte[] bytes, final boolean isForce) {
    return writeFileFromBytesByChannel(getFileByPath(filePath), bytes, false, isForce);
  }

  /**
   * 将字节数组写入文件
   *
   * @param filePath 文件路径
   * @param bytes    字节数组
   * @param append   是否追加在文件末
   * @param isForce  是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByChannel(final String filePath, final byte[] bytes, final boolean append, final boolean isForce) {
    return writeFileFromBytesByChannel(getFileByPath(filePath), bytes, append, isForce);
  }

  /**
   * 将字节数组写入文件
   *
   * @param file    文件
   * @param bytes   字节数组
   * @param isForce 是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByChannel(final File file, final byte[] bytes, final boolean isForce) {
    return writeFileFromBytesByChannel(file, bytes, false, isForce);
  }

  /**
   * 将字节数组写入文件
   *
   * @param file    文件
   * @param bytes   字节数组
   * @param append  是否追加在文件末
   * @param isForce 是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByChannel(final File file, final byte[] bytes, final boolean append, final boolean isForce) {
    if (bytes == null) return false;
    FileChannel fc = null;
    try {
      fc = new FileOutputStream(file, append).getChannel();
      fc.position(fc.size());
      fc.write(ByteBuffer.wrap(bytes));
      if (isForce) fc.force(true);
      return true;
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    } finally {
      CloseUtils.closeIO(fc);
    }
  }

  /**
   * 将字节数组写入文件
   *
   * @param filePath 文件路径
   * @param bytes    字节数组
   * @param isForce  是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByMap(final String filePath, final byte[] bytes, final boolean isForce) {
    return writeFileFromBytesByMap(filePath, bytes, false, isForce);
  }

  /**
   * 将字节数组写入文件
   *
   * @param filePath 文件路径
   * @param bytes    字节数组
   * @param append   是否追加在文件末
   * @param isForce  是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByMap(final String filePath, final byte[] bytes, final boolean append, final boolean isForce) {
    return writeFileFromBytesByMap(getFileByPath(filePath), bytes, append, isForce);
  }

  /**
   * 将字节数组写入文件
   *
   * @param file    文件
   * @param bytes   字节数组
   * @param isForce 是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByMap(final File file, final byte[] bytes, final boolean isForce) {
    return writeFileFromBytesByMap(file, bytes, false, isForce);
  }

  /**
   * 将字节数组写入文件
   *
   * @param file    文件
   * @param bytes   字节数组
   * @param append  是否追加在文件末
   * @param isForce 是否写入文件
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromBytesByMap(final File file, final byte[] bytes, final boolean append, final boolean isForce) {
    if (bytes == null || !createOrExistsFile(file)) return false;
    FileChannel fc = null;
    try {
      fc = new FileOutputStream(file, append).getChannel();
      MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_WRITE, fc.size(), bytes.length);
      mbb.put(bytes);
      if (isForce) mbb.force();
      return true;
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    } finally {
      CloseUtils.closeIO(fc);
    }
  }

  /**
   * 将字符串写入文件
   *
   * @param filePath 文件路径
   * @param content  写入内容
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromString(final String filePath, final String content) {
    return writeFileFromString(getFileByPath(filePath), content, false);
  }

  /**
   * 将字符串写入文件
   *
   * @param filePath 文件路径
   * @param content  写入内容
   * @param append   是否追加在文件末
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromString(final String filePath, final String content, final boolean append) {
    return writeFileFromString(getFileByPath(filePath), content, append);
  }

  /**
   * 将字符串写入文件
   *
   * @param file    文件
   * @param content 写入内容
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromString(final File file, final String content) {
    return writeFileFromString(file, content, false);
  }

  /**
   * 将字符串写入文件
   *
   * @param file    文件
   * @param content 写入内容
   * @param append  是否追加在文件末
   * @return {@code true}: 写入成功<br>{@code false}: 写入失败
   */
  public static boolean writeFileFromString(final File file, final String content, final boolean append) {
    if (file == null || content == null) return false;
    if (!createOrExistsFile(file)) return false;
    BufferedWriter bw = null;
    try {
      bw = new BufferedWriter(new FileWriter(file, append));
      bw.write(content);
      return true;
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    } finally {
      CloseUtils.closeIO(bw);
    }
  }

  ///////////////////////////////////////////////////////////////////////////
  // the divide line of write and read
  ///////////////////////////////////////////////////////////////////////////

  /**
   * 读取文件到字符串链表中
   *
   * @param filePath 文件路径
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final String filePath) {
    return readFile2List(getFileByPath(filePath), null);
  }

  /**
   * 读取文件到字符串链表中
   *
   * @param filePath    文件路径
   * @param charsetName 编码格式
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final String filePath, final String charsetName) {
    return readFile2List(getFileByPath(filePath), charsetName);
  }

  /**
   * 读取文件到字符串链表中
   *
   * @param file 文件
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final File file) {
    return readFile2List(file, 0, 0x7FFFFFFF, null);
  }

  /**
   * 读取文件到字符串链表中
   *
   * @param file        文件
   * @param charsetName 编码格式
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final File file, final String charsetName) {
    return readFile2List(file, 0, 0x7FFFFFFF, charsetName);
  }

  /**
   * 读取文件到字符串链表中
   *
   * @param filePath 文件路径
   * @param st       需要读取的开始行数
   * @param end      需要读取的结束行数
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final String filePath, final int st, final int end) {
    return readFile2List(getFileByPath(filePath), st, end, null);
  }

  /**
   * 读取文件到字符串链表中
   *
   * @param filePath    文件路径
   * @param st          需要读取的开始行数
   * @param end         需要读取的结束行数
   * @param charsetName 编码格式
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final String filePath, final int st, final int end, final String charsetName) {
    return readFile2List(getFileByPath(filePath), st, end, charsetName);
  }

  /**
   * 读取文件到字符串链表中
   *
   * @param file 文件
   * @param st   需要读取的开始行数
   * @param end  需要读取的结束行数
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final File file, final int st, final int end) {
    return readFile2List(file, st, end, null);
  }

  /**
   * 读取文件到字符串链表中
   *
   * @param file        文件
   * @param st          需要读取的开始行数
   * @param end         需要读取的结束行数
   * @param charsetName 编码格式
   * @return 字符串链表中
   */
  public static List<String> readFile2List(final File file, final int st, final int end, final String charsetName) {
    if (!isFileExists(file)) return null;
    if (st > end) return null;
    BufferedReader reader = null;
    try {
      String line;
      int curLine = 1;
      List<String> list = new ArrayList<>();
      if (isSpace(charsetName)) {
        reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
      } else {
        reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), charsetName));
      }
      while ((line = reader.readLine()) != null) {
        if (curLine > end) break;
        if (st <= curLine && curLine <= end) list.add(line);
        ++curLine;
      }
      return list;
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    } finally {
      CloseUtils.closeIO(reader);
    }
  }

  /**
   * 读取文件到字符串中
   *
   * @param filePath 文件路径
   * @return 字符串
   */
  public static String readFile2String(final String filePath) {
    return readFile2String(getFileByPath(filePath), null);
  }

  /**
   * 读取文件到字符串中
   *
   * @param filePath    文件路径
   * @param charsetName 编码格式
   * @return 字符串
   */
  public static String readFile2String(final String filePath, final String charsetName) {
    return readFile2String(getFileByPath(filePath), charsetName);
  }

  /**
   * 读取文件到字符串中
   *
   * @param file 文件
   * @return 字符串
   */
  public static String readFile2String(final File file) {
    return readFile2String(file, null);
  }

  /**
   * 读取文件到字符串中
   *
   * @param file        文件
   * @param charsetName 编码格式
   * @return 字符串
   */
  public static String readFile2String(final File file, final String charsetName) {
    if (!isFileExists(file)) return null;
    BufferedReader reader = null;
    try {
      StringBuilder sb = new StringBuilder();
      if (isSpace(charsetName)) {
        reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
      } else {
        reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), charsetName));
      }
      String line;
      if ((line = reader.readLine()) != null) {
        sb.append(line);
        while ((line = reader.readLine()) != null) {
          sb.append(LINE_SEP).append(line);
        }
      }
      return sb.toString();
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    } finally {
      CloseUtils.closeIO(reader);
    }
  }

  /**
   * 读取文件到字节数组中
   *
   * @param filePath 文件路径
   * @return 字符数组
   */
  public static byte[] readFile2BytesByStream(final String filePath) {
    return readFile2BytesByStream(getFileByPath(filePath));
  }

  /**
   * 读取文件到字节数组中
   *
   * @param file 文件
   * @return 字符数组
   */
  public static byte[] readFile2BytesByStream(final File file) {
    if (!isFileExists(file)) return null;
    FileInputStream fis = null;
    ByteArrayOutputStream os = null;
    try {
      fis = new FileInputStream(file);
      os = new ByteArrayOutputStream();
      byte[] b = new byte[sBufferSize];
      int len;
      while ((len = fis.read(b, 0, sBufferSize)) != -1) {
        os.write(b, 0, len);
      }
      return os.toByteArray();
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    } finally {
      CloseUtils.closeIO(fis, os);
    }
  }

  /**
   * 读取文件到字节数组中
   *
   * @param filePath 文件路径
   * @return 字符数组
   */
  public static byte[] readFile2BytesByChannel(final String filePath) {
    return readFile2BytesByChannel(getFileByPath(filePath));
  }

  /**
   * 读取文件到字节数组中
   *
   * @param file 文件
   * @return 字符数组
   */
  public static byte[] readFile2BytesByChannel(final File file) {
    if (!isFileExists(file)) return null;
    FileChannel fc = null;
    try {
      fc = new RandomAccessFile(file, "r").getChannel();
      ByteBuffer byteBuffer = ByteBuffer.allocate((int) fc.size());
      while (true) {
        if (!((fc.read(byteBuffer)) > 0)) break;
      }
      return byteBuffer.array();
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    } finally {
      CloseUtils.closeIO(fc);
    }
  }

  /**
   * 读取文件到字节数组中
   *
   * @param filePath 文件路径
   * @return 字符数组
   */
  public static byte[] readFile2BytesByMap(final String filePath) {
    return readFile2BytesByMap(getFileByPath(filePath));
  }

  /**
   * 读取文件到字节数组中
   *
   * @param file 文件
   * @return 字符数组
   */
  public static byte[] readFile2BytesByMap(final File file) {
    if (!isFileExists(file)) return null;
    FileChannel fc = null;
    try {
      fc = new RandomAccessFile(file, "r").getChannel();
      int size = (int) fc.size();
      MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, size).load();
      byte[] result = new byte[size];
      mbb.get(result, 0, size);
      return result;
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    } finally {
      CloseUtils.closeIO(fc);
    }
  }

  /**
   * 设置缓冲区尺寸
   *
   * @param bufferSize 缓冲区大小
   */
  public static void setBufferSize(final int bufferSize) {
    sBufferSize = bufferSize;
  }

  private static File getFileByPath(final String filePath) {
    return isSpace(filePath) ? null : new File(filePath);
  }

  private static boolean createOrExistsFile(final String filePath) {
    return createOrExistsFile(getFileByPath(filePath));
  }

  private static boolean createOrExistsFile(final File file) {
    if (file == null) return false;
    if (file.exists()) return file.isFile();
    if (!createOrExistsDir(file.getParentFile())) return false;
    try {
      return file.createNewFile();
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    }
  }

  private static boolean createOrExistsDir(final File file) {
    return file != null && (file.exists() ? file.isDirectory() : file.mkdirs());
  }

  private static boolean isFileExists(final File file) {
    return file != null && file.exists();
  }

  private static boolean isSpace(final String s) {
    if (s == null) return true;
    for (int i = 0, len = s.length(); i < len; ++i) {
      if (!Character.isWhitespace(s.charAt(i))) {
        return false;
      }
    }
    return true;
  }
}
